We have peafowl. Actually no, the peafowl have us - we moved into their farm.
They're semi-wild, but queue up for a handful of peanuts before bedtime each night. They roost in the trees, or sometimes on the roof of the house, and eat layer's pellets from the hen feeder. They are noisy, but only really between March and July (breeding season).
The usual advice, as Richmond says is to keep them penned for at least a month, so they centre their range on your property, and know that's where the food is. They do have homing instincts though, and have been known to travel 30+ miles cross country to get back to where they came from.
We've never lost one to a fox, though we have lost a couple of nests with eggs, and one hen was injured fighting off a fox. As Richmond says, they're pretty vulnerable when sitting on the nest. Chick mortality is also pretty high IME, at least until the chicks are reasonably grown, so are strong and can fly. In general, they'll just fly up a tree and make a lot of noise if threatened by a fox or dog though.
I'd say definitely get some - they're fascinating, intelligent birds. We absolutely love 'ours'.